Typically, Byzantine Greek names such as these are translated into an intelligible English approximation (for example, Palaiologos = "old word"/"ragman" or Choniates = "from Chonai"), but I'm having some trouble with this one. I can't seem to find a modern source who provides a scholarly rendering, all of my references are oddly silent. I mean, it can't possibly mean "cabbage dragon". There has to be some other less literal meaning that I'm missing.
What's the context of the name? I'm wondering if it could be a compound of vegetables and Drakon, the ancient Athenian lawgiver, though I can't imagine that being used as a name anywhere outside of a comedy.
Well could come from the words λαχη, "a share, a lot" and then from the part of the verb δερκομαι, the root of which is ---> δρακων (where our and the Greek word for 'dragon' comes from) and derkomai means " to see clearly, see keenly". So, I guess one possibility is the "man who sees the lot clearly", i.e "the man who sees destiny", "the man who foresees". I'm not an etymologist though, just guessing. Don't know if that extra syllable needs to have a reason...
Edit: Cannot λαχανον also mean garden in classical Greek? What's the word for garden e.g. garden of Eden in Byzantine Greek? "The one who sees the garden" might have religious connotations?